A photonic crystal fiber ring resonator (PCF-RR), constructed with a length of high-birefringence PCF and a conventional polarization-maintaining (PM) coupler whose pigtail fiber is of PANDA type, is fabricated. The resonating curve of the PCF-RR is experimentally obtained with the finesse about 14. Moreover, the backscattering curve of the PCF-RR is measured and the in-cavity equivalent backscattering coefficient is estimated. In addition, the shot-noise limited sensitivity (SLS) of resonant fiber optic gyroscope (RFOG) equipped with the fabricated PCF-RR is numerically calculated and disscussed.
We propose a novel structure of 1×4 power splitter based on multi-core square-lattice photonic crystal fiber (PCF) that is composed of four neighboring outer cores and a central incident core. The coupled-mode theory for five identical propagation cores is demonstrated to understand the coupling characteristics for the proposed multi-core PCF splitter. The coupling behaviors along longitudinal propagation direction between the central and neighboring cores are accurately investigated by using the finite element method (FEM) and the beam propagation method (BPM). Through the numerical analysis, it is shown that the optical power launched into the central incident core is able to be equally divided into other neighboring four cores with about 25% of coupling ratio in a several-millimeter long PCF at the operating wavelength of 1.55 μm. The power coupling characteristics obtained through the BPM are in very good agreement with that calculated from coupled-mode theory.
We propose a novel structure of polarization splitter based on symmetric dual-core PCF with triangular lattice. The polarization-dependent coupling properties for x and y polarization modes, including coupling length, coupling length ratio (CLR) and propagation process in the designed splitter, are numerically investigated by using the full-vector finite element method (FEM) and the semi-vector beam propagation method (BPM). The simulation results show that CLR can be tuned to be about 4/3 and 3/2 at λ = 1.55 μm to meet the requirement of polarization split by optimizing the geometric parameters. For the case of CLR = 4/3, the polarization splitter with a total physical length of 3.12 mm is obtained and its extinction ratio is as low as -48 dB at λ = 1.55 μm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.